Komatsu Backhoe Loader WB140-2 WB150-2 service & repair manual

Description Komatsu Backhoe Loader WB140-2 WB150-2 service & repair manual

Komatsu Backhoe Loader WB140-2, WB150-2 pdf workshop service repair manual + operation & maintenance manual

Serial numbers:
WB140-2 30026 and up, 140F10001 and up, 140F11451 and up, 140F11531 and up
WB150-2 150F10001 and up, 150F10293 and up, 150F10303 and up

Technical data, specifications, testing, troubleshooting, maintenance, electrical diagrams, hydraulic schematics, adjusting, assembly, disassembly, removal, installation instructions and other information

MANUAL CONTENT:
STRUCTURE AND FUNCTION
Power train
Transmission
Drive shafts
Control valve block
Front axle
Rear axle
Hydraulic pump
Steering unit
Hydraulic circuit
Shovel control valve
Backhoe control valve
CLSS
Solenoid valve
Safety valve
Brake pump
Shovel cylinder
Backhoe cylinder
Air-conditioning unit
How the air-conditioning unit functions
Electrical diagram
Electrical diagram (Air conditioning)

TESTING AND ADJUSTMENTS
Normal or standard technical data
Special tools
Measuring engine speed
Adjusting valve clearance
Measuring compression pressure
Testing and adjusting fuel injection timing
Checking and tightening the fan - belt
Checking and tightening the compressor fan - belt
Measuring accelerator pedal operating travel and accelerator lever
Adjusting brake pedal travel, brake alignment, microswitches
Air bleeding - releasing residual pressure
Checking and setting pressure in the attachments hydraulic circuit
Testing and adjusting of load sensing signal (LS valve)
Testing and adjusting of unloading valve
Checking unloading valve functionality
Testing priority valve operation
Testing and setting steering control system pressure
Testing brake system
Control of the engine speed under load
Testing pressures in the power train group
Testing the correct functioning of the power train clutches
Adjusting the sensor for return to dig device
Analysis of causes hydraulic drift
Testing the air-conditioning unit
Emptying the air-conditioning unit
Troubleshooting

REMOVAL AND INSTALLATION
PRECAUTIONS TO BE TAKEN WHILE WORKING
SPECIAL TOOLS
STARTING MOTOR
ALTERNATOR
AIR-CONDITIONING UNIT COMPRESSOR
INJECTION PUMP
INJECTION NOZZLES
THERMOSTAT
COOLING LIQUID PUMP
TURBOCOMPRESSOR
CYLINDER HEAD
ACCUMULATOR DISCONNECTING SWITCH
FRONT COUNTERWEIGHT
RADIATOR-OIL COOLER UNIT
CONDENSER
HYDRAULIC OIL COOLER
TRANSMISSION OIL COOLER
MUFFLER
EXHAUST PIPE
ENGINE HOOD
CAB
HEAT AND AIR-CONDITIONING GROUP
FUEL TANK
ENGINE-GEARBOX-PUMP GROUP
PISTON PUMP
TRANSMISSION
CONVERTOR
TRANSMISSION-REVERSE, DIRECTION
INDICATOR AND HEADLIGHT DIPPER BEAM
CONTROL GROUP
STEERING UNIT

WORKING BRAKE PUMP GROUP
FRONT WORKING EQUIPMENT CONTROL VALVE
FRONT AXLE
REAR AXLE
FRONT BUCKET BOOM-RAISING CYLINDER
FRONT BUCKET TILT CYLINDERS
FRONT BUCKET
FRONT WORKING EQUIPMENT
BACKHOE CONTROL VALVE
BACKHOE BOOM CYLINDER
BACKHOE ARM CYLINDER
TELESCOPIC ARM CYLINDER
BACKHOE BUCKET CYLINDER
OUTRIGGER CYLINDERS
BACKHOE SWING CYLINDERS
CYLINDERS (Front bucket raise and tilt, boom, arm, bucket, outriggers and telescopic arm)
BOOM SWING CYLINDER
BOOM SAFETY CYLINDER
BACKHOE WORKING EQUIPMENT
BACKHOE BUCKET
ARM
TELESCOPIC ARM
2nd ARM
2nd ARM GUIDES
BACKHOE BOOM
BACKHOE SWING BRACKET
BACKHOE OUTRIGGERS

STANDARD MAINTENANCE
Hydraulic pump
8-Spool control valve
Brake pump
Shovel cylinders
Backhoe cylinders
Front working equipment
Swing bracket
Backhoe working equipment

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